1. Quantities up to 2 ng/ml are not considered to constitute a doping offence. The laboratories do normally not report concentrations below 2 ng/ml to the Federation. There is uncertainty among experts as to the maximum concentration of Nandrolone produced by a human body. Consequently, the mere finding of Nandrolone in a concentration between 2 and 5 ng/ml may constitute a doping offence, but requires further investigations in order to confirm the result of the analysis. However, within the “grey zone” the likelihood that Nandrolone is produced endogenously, is decreasing exponentially. The probability of an endogenous production of Nandrolone in quantities beyond 5 ng/ml was held to be very unlikely. Therefore quantities beyond 5 ng/ml are very likely to be confirmed by further investigations and may be regarded as sufficient evidence to constitute a doping offence.